Ermakova, Olga. “Enemies or Allies? The Crimean War and British-Russian Technical Cooperation in the Urals”. Quaestio Rossica, no. 3 (October 1, 2015): 67 - 77. Accessed August 1, 2021. https://qr.urfu.ru/ojs/index.php/qr/article/view/112.